Valid geometry
A geometry that follows topological rules (closed rings, no self-intersections, properly nested holes, etc.).
Category: Topology
Definition (expanded)
Validity rules depend on standards and libraries, but common requirements include closed rings, non-self-intersecting boundaries, and holes contained within the outer ring. Invalid geometries can break union, buffer, difference, and export pipelines.
Related terms
Self-intersectionWhen a polygon boundary crosses itself (a bow-tie shape), often making it invalid.Ring (Linear Ring)A closed sequence of coordinates used as a polygon boundary (exterior) or hole (interior).Hole (Interior Ring)An interior ring inside a polygon that subtracts area (a cut-out).Make validA repair step that converts invalid polygons into valid geometry, often by splitting or reshaping boundaries.Duplicate vertexA repeated coordinate in sequence, often caused by editing or precision issues.Zero-area ringA ring that encloses no area, often because points repeat or the ring collapses onto a line.